Breaker tripping

Have a rental property. Tenants complained about a breaker tripping once or twice a day.
Breaker feeds living room and ceiling light.
When this happens the light is not on and only two outlets in use. Floor fan and then TV and stereo.
Anyway I went over and replaced the breaker and both outlets since I had them out to inspect for any burnt wires.
But everything really looked fine. Did I miss anything?
If it happens again can I assume it is a problem with their newer flat screen TV, the stereo or fan?
Any suggestions on anything else I could have checked?

Busy on another project until I get back over there next week. But the 121 volts was at the outlet. And do have a clamp on my Fluke meter, just did not think to check at the time. Was not tripping often.

No ac. Nothing else I could tell on that circuit. Just a ceiling light not used when breaker tripped. And a small floor fan, TV, cable tv box and small stero.
Dealing with a few other things. Will try to follow up and get over there to check the amp draw. And maybe take out a few more outlets to look for any burnt wires in boxes for lack of anything else to check. They did have one outlet that had recently been used for their computer, but said all of that was unplugged when this started.